body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: #000005;
    color: #fff;
    height: 100vh;
    margin: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

nav {
    width: 100%;
    padding: 20px 0;
    text-align: center;
    background: rgba(0, 0, 10, 0.8);
    backdrop-filter: blur(5px);
    border-bottom: 2px solid #0ff;
    position: relative;
    z-index: 999999;
}

nav button {
    background: transparent;
    color: #0ff;
    border: 2px solid #0ff;
    padding: 12px 24px;
    margin: 5px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.2s ease;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

nav button:hover {
    background: #0ff;
    color: #000;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.8);
}

.scene {
    width: 80vw;
    height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
}

.cube {
    width: 100%;
    height: 100%;
    position: relative;
}

.cube__face {
    position: absolute;
    inset: 0;
    background: rgba(0, 10, 30, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 40px;
    overflow-y: auto;
    border: 3px solid #0ff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5), inset 0 0 10px rgba(0, 255, 255, 0.3);
}

.content {
    text-align: center;
    width: 100%;
    max-width: 1200px;
}

h1 {
    font-size: 4rem;
    color: #fff;
    text-shadow: 0 0 10px #0ff, 0 0 20px #0ff, 0 0 30px #0ff;
    margin-bottom: 20px;
}

p {
    font-size: 1.5rem;
    line-height: 1.8;
}

ul {
    text-align: left;
    display: inline-block;
    font-size: 1.3rem;
}

.video-container iframe {
    width: 100%;
    margin-top: 20px;
    border: 3px solid #0ff;
    box-shadow: 0 0 15px #0ff;
}

@media (max-width: 1000px) {
    .scene { width: 95vw; height: 70vh; }
    h1 { font-size: 2.5rem; }
    p { font-size: 1.1rem; }
}